Incorporating Seismotectonic Data into Seismic Hazard Analysesby Kevin J. Coppersmith, Geomatrix Consultants, Inc, United States,
Abstract: A wide range of seismotectonic data are now being incorporated into probabilistic seismic hazard analyses, supplementing the inadequately short historical seismicity record. This paper focuses on recent findings in paleoseismic research and methods to include seismotectonic data into seismic hazard analyses. Geologic and geomorphic data provide a primary basis for assessing the location of earthquake sources, both faults as well as active folds associated with blind faults. Inversion of teleseismic data for several Basin and Range earthquakes shows that all of these events are associated with moderate to steeply-dipping faults, despite the presence of subhorizontal listric reflectors seen on deep seismic reflection data. Fault segmentation studies and improved understanding of the dimensions of earthquake ruptures are allowing for better estimates of maximum magnitude.
Subject Headings: Seismic effects | Seismic tests | Data analysis | Geological faults | Earthquakes | Radioactive wastes
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